1 Topic by Robny

  • Robny
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  • Registered: 2014-08-25
  • Posts: 89

Topic: X Calibration

Hello

Please can someone help with the x calibration on the Press, if I make the required adjustment to bring it into line then the carriage does not go far enough over to home the z probe, which leads to a crash.

Has anybody done this calibration and how did you retain the automatic probe, or do you just lift and lower manually?

Thanks
Rob

2 Reply by Robny

  • Robny
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Re: X Calibration

Has nobody encountered this problem when adjusting the steps/mm on the x motor?

3 Reply by gripner

  • gripner
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  • Registered: 2015-12-25
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Re: X Calibration

I also have this issue, but with solidoodle workbench.

If i print a circle 150mm diameter Y is 150mm X is almost 3mm bigger !

If i print a Square 100x100 again Y is spot on 100mm but X is 101.4

Cant find any information on how to adjust steps/mm for x tho

4 Reply by trayracing

  • trayracing
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  • Registered: 2014-09-17
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Re: X Calibration

Hi gripner. Try this (assuming the workbench is also Marlin based):
http://reprap.org/wiki/G-code#M92:_Set_ … s_per_unit
Be sure to execute an M501 first and save that info somewhere, in case your new numbers don't impove things. (The current numbers also serve as a starting point).

From the numbers you posted, you have more than just a scaling issue, since the error doubled when you scaled up 50%.

5 Reply by trayracing

  • trayracing
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  • Registered: 2014-09-17
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Re: X Calibration

Robny, I realize it's an old post - did you get past this? The low tech route (assuming the end stop switch isn't adjustable) would be to shim the point where the switch hits the carriage.

Or maybe (speculating here) using G92 (set position) between the homing and z probe could shift things over to let it engage the extend/retract. Or maybe not - depends how the firmware implements it. I haven't looked at the z-probe code or needed to tweak that behavior.